Samsung Gusto 2 / Gusto 3

Please someone tell me that my beloved samsung gusto is not obsolete..... I am receiving incomplete text messages in addition to texts that just have symbols instead of letters and words. I believe the symbols messages are emoji's. The incomplete messages worry me as I ask if people who sent them did anything different or unusual..... but nothing stands out. The messages dont even have certain senders in common. It seems to be intermittent. Can anyone help???